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Period 2
4.1 Watersheds and Wetlands
4.2 Renewable and nonrenewable resources
4.3 Environmental Health
4.4 Agriculture and Society
4.5 Integrated Pest Management
4.6 Ecosystems and Their Interaction
4.7 Threatened, Endangered and Extinct Species
4.8 Humans and the Environment
4.9 Environmental Laws and Regulations
Period 3
4.1 Watersheds and Wetlands
4.2 Renewable and nonrenewable resources
4.3 Environmental Health
4.4 Agriculture and Society
4.5 Integrated Pest Management
4.6 Ecosystems and Their Interaction
4.7 Threatened, Endangered and Extinct Species
4.8 Humans and the Environment
4.9 Environmental Laws and Regulations
Pollution
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Air pollution is present everywhere. Everyday, people pollute the air many ways.
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